Gardening Ideas Grow the Perfect Hollyhocks By Southern Living Editors Updated on March 10, 2017 Share Tweet Pin Email Trending Videos Photo: Photo: Ralph Lee Anderson These spectacular perennials regularly reach 8 feet—and taller! 01 of 06 About Hollyhocks Photo: Ralph Lee Anderson Light: Full sun Soil: Moist, fertile, well drained Fertilize: In spring and summer 02 of 06 Color Choices Photo: Ralph Lee Anderson Hollyhocks, unlike most perennials, don't have varieties. They're typically sold in a seed mix of assorted colors, so you don't know what you're going to get until they bloom. 03 of 06 Editor's Tip Photo: Ralph Lee Anderson Weed out any unwelcome colors by pulling up the spikes before they set seed. 04 of 06 When They Will Bloom Photo: Ralph Lee Anderson Started from seed in spring, the plants grow only foliage the first year and then bloom in spring and summer after that. If you purchase a one-year-old plant in a pot this spring, it will bloom right away. 05 of 06 Height Photo: Ralph Lee Anderson Flower spikes sprout from the base of the plant and elongate until they can stand 6 to 9 feet tall. They're usually planted in the back of a border and staked for support. Spikes bloom for weeks, opening from bottom to top. 06 of 06 Care Tips Photo: Ralph Lee Anderson After a spike finishes, cut it off at the base and a new spike may grow to replace it. However, be sure to save some seeds to plant the following spring. That way, when the original plant eventually dies, you'll have new plants ready to go Was this page helpful? Thanks for your feedback! Tell us why! Other Submit